[QUOTE=Photo Engineer;1374130]As I said, use distilled!!!!! It is less expensive and is perfectly fine.

Using DI water instead of DW is like using a cannon to shoot gnats.

The only thing worse (more expensive and uselessly so) would be to use DI DW. That is way overkill.

Use Distilled Water. Here it is less than $1 / gallon. You can even buy small stills to make it yourself.

PE[/QUOTE
I am sorry I am missing something as distilled does not remove inorganics like calcium so how does this help?
Distilled is just as hard to find locally and getting a still yourself is (in the UK) met with GREAT suspicion.
Alan